<!--父级页面：控制除登录页以外的所有子级页面共有的左侧菜单栏与顶部条-->
<template>
  <div style="display: flex">
    <div :style="{width:(isCollapse?'64px':'208px')}">
      <!--  左侧菜单栏-->
      <el-menu
          background-color="#000"
          style="width: 100%;height: 100vh;"
          text-color="#fff"
          active-text-color="#ff0"
          unique-opened
          router
          :collapse="isCollapse"
          :collapse-transition="false"
      >
        <!--左侧菜单栏顶部条-->
        <el-row style="padding-top: 10px ">
          <el-col :span="2"></el-col>
          <el-col :span="7" style="padding-left: 7px">
            <el-avatar src="/imgs/admin/logo.png" style="width: 35px;height: 35px;"></el-avatar>
          </el-col>
          <el-col :span="isCollapse?0:13">
            <span style="color: #fff;font-weight: bold;position: relative;top: 8px;left: 2px;">宠物管理系统</span>
          </el-col>
        </el-row>
        <el-sub-menu index="1">
          <template #title>
            <el-icon style="font-size: 21px;"><User/></el-icon>
            <span>用户管理</span>
          </template>
          <el-menu-item index="/user">用户列表</el-menu-item>
        </el-sub-menu>
        <el-sub-menu index="2">
          <template #title>
            <el-icon style="font-size: 21px;"><Pet/></el-icon>
            <span>宠物管理</span>
          </template>
          <el-menu-item index="/petBreed">宠物品种 </el-menu-item>
          <el-menu-item index="/petSupplies">宠物用品</el-menu-item>
        </el-sub-menu>
        <el-sub-menu index="3">
          <template #title>
            <el-icon style="font-size: 21px;"><MessageBox/></el-icon>
            <span>数据字典</span>
          </template>
          <el-menu-item index="/dict">字典管理</el-menu-item>
        </el-sub-menu>
        <el-sub-menu index="4">
          <template #title>
            <el-icon style="font-size: 21px;"><Trading/></el-icon>
            <span>宠物交易</span>
          </template>
          <el-menu-item index="/petSales">宠物买卖</el-menu-item>
          <el-menu-item index="/petAdoption">宠物领养</el-menu-item>
        </el-sub-menu>
        <el-sub-menu index="5">
          <template #title>
            <el-icon style="font-size: 21px;"><Component/></el-icon>
            <span>宠物社区</span>
          </template>
          <el-menu-item index="/petForum">宠物论坛</el-menu-item>
        </el-sub-menu>
        <el-sub-menu index="6">
          <template #title>
            <el-icon style="font-size: 21px;"><Service/></el-icon>
            <span>宠物服务</span>
          </template>
          <el-menu-item index="/Medicine">宠物医疗</el-menu-item>
          <el-menu-item index="/Grooming">宠物美容</el-menu-item>
          <el-menu-item index="/Boarding">宠物寄养</el-menu-item>
          <el-menu-item index="/Funeral">宠物殡葬</el-menu-item>
        </el-sub-menu>
        <el-sub-menu index="7">
          <template #title>
            <el-icon style="font-size: 21px;"><personalizedFunction/></el-icon>
            <span>个性化功能</span>
          </template>
          <el-menu-item index="/dict">宠物生日提醒</el-menu-item>

        </el-sub-menu>
      </el-menu>
    </div>
    <div :style="{width:(isCollapse?'calc(100% - 64px)':'calc(100% - 208px)')}">
      <!--  右侧顶部条-->
      <el-header style="padding-top: 22px;height: 10vh;background-color: #fff">
        <!--    -->
        <el-row :gutter="10">
          <el-col :span="18">
            <el-icon style="font-size: 20px;" @click = "changeCollapsed"><Expand/></el-icon>
          </el-col>
          <el-col :span="6" style="position: relative">
            <el-dropdown style="position: absolute;right: 20px">
          <span style="font-size: 19px;font-weight: bold;">
<!--            {{user.username}}-->
            <el-icon ><arrow-down /></el-icon>
          </span>
              <template #dropdown>
                <el-dropdown-menu>
                  <el-dropdown-item @click="logout">退出登录</el-dropdown-item>
                </el-dropdown-menu>
              </template>
            </el-dropdown>
          </el-col>
        </el-row>
        <!--    面包屑导航-->
        <el-breadcrumb separator="/" style="position: relative;top: 20px">
          <el-breadcrumb-item>首页</el-breadcrumb-item>
          <el-breadcrumb-item v-for="item in breadcrumb">{{item}}</el-breadcrumb-item>
          <!--      <el-breadcrumb-item>用户管理</el-breadcrumb-item>-->
          <!--      <el-breadcrumb-item>用户列表</el-breadcrumb-item>-->
        </el-breadcrumb>
      </el-header>
      <!--  右侧可变区域-->
      <el-main style="height: 90vh;padding: 0;overflow-y: auto">
        <router-view></router-view>
      </el-main>
    </div>
  </div>
</template>

<script setup>
import {onMounted, ref} from "vue";
import {useRoute,useRouter} from "vue-router";

const isCollapse = ref(false);
const changeCollapsed = () =>{
  isCollapse.value = !isCollapse.value;
}
//定义变量用来保存当前登录的用户名
//const user = ref(getUser());
//定义退出登录的方法
const logout = ()=>{
  if (confirm('您确认要退出登录吗?')){
    //退出时：清空localStorage中的user数据
    localStorage.removeItem('user');
    //跳转回登录页
    window.location.href = '/login';
    //清空user变量
  }
}
//定义对象用来维护当前面包屑导航显示的值
const breadcrumb = ref();
//定义对象用来维护路由path与面包
let map = {
  '/user':['用户管理','用户列表'],
  '/dict':['数据字典','字典管理'],
  '/dictOption':['字典管理','字典项'],
  '/petBreed':['宠物管理','宠物品种'],
  '/petSupplies':['宠物管理','宠物用品'],
  '/petAdoption':['宠物交易','宠物领养'],
  '/petSales':['宠物交易','宠物买卖'],
  '/petForum':['宠物社区','宠物论坛']
};
//userRoute()是vue路由器提供的一个API，用来访问当前组件的路由状态数据，获取的是当前路由对象
const route = useRoute();
//定义方法，每次路由发生变化事，立即触发
const updateBreadcrumb = (route)=>{
  //取出当前路由的path值
  const path = route.path;
  breadcrumb.value = map[path] || ['用户管理','用户列表'];
}
//一进到页面立即执行的方法onMounted()
onMounted(()=>{
  updateBreadcrumb(route);
})
//获取一个路由器对象
const router = useRouter();
//监听路由的变化，如果发生了改变
router.beforeEach((to,from,next)=>{
  //立即更新面包屑的值
  updateBreadcrumb(to);
  //再进行路由跳转
  next();
})
</script>